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Bell & Gossett Airtrol Tank Fittings

Bell & Gossett Airtrol Tank Fittings help to establish proper initial liquid level in the compression tank when filling the hydronic system. They also help maintain proper system pressurization by directing released air to the compression tank during system operation and permit cooler liquid flow to the boiler during the off cycle as system liquid cools. Airtrol Tank Fittings must be used with the appropriate sized Airtrol Boiler Fitting, In-Line Airtrol or Rolairtrol air separator.


  • Body: Cast Iron
  • Tubes: Copper and Copper Plated
  • Vent Tube Fitting: Brass
  • Ball Check: ATFL (only), Stainless Steel